.nav{
    width: 100%;
    height: 50px;
    :global{
        .box{
            width: 1200px;
            margin-left: auto;
            margin-right: auto;
            overflow: hidden;
            padding-top: 10px;
            .l{
                float: left;
            }
            .r{
                float: right;
            }
            .l,.r{
                .navitm{
                    display: inline-block;
                    // width: ;
                }
            }
        }
    }
}